The pressure on a square plate is measured by measuring the force on the plate and the length of the sides of the plate by using the formula \[p=\frac{F}{{{l}^{2}}}.\] If the maximum errors in the measurement of force and length are 4% and 2% respectively. Then the maximum error in the measurement of pressure is
A) 1%
B) 2%
C) 8%
D) 10%
Correct Answer:
A
Solution :
Maximum percentage error in p \[p=4%+2\times 2%\] \[=8%\]